Dent removing device



June 29, 1937. w. WILLIAMS 2,085,057

DENT REMOVING DEVICE lFiled June 5, .1936

/m/en for XNL'ZZec/ Williams Patented .l une 29, 1937 @METRE SI'A'LSPATENT @FFEQE Application June 3, 1936, Serial No. 83,346

2 Claims.

(Granted under the act of March 3, 1883, as amended April 30, 1928; 3700. G. 757) This invention describe-d herein may be manufactured and usedby or for the Government for governmental purposes, without the paymentto me of any royalty thereon.

This invention relates to a dent removing device, more particularly itis directed to an apparatus of the character specied for removingindentations in musical instruments. of the horn type and one of itsobjects is to provide an improved dent remover adapted to be inserted ina tubular element either straight or curved and remotely operated,exterior of the element to remove surface irregularities.

Another object of this invention is to provide a .dent removing deviceof simple, strong and thoroughly practical construction embodying a headhaving an expanding member pivotally mounted therein and including aremotely controlled mechanism whereby the expanding member may becontrolled at will to bear with any desired force upon the interiorsurface of a casing and force the indented surface into its normal planethus restoring the surface to its original form.

Another object of this invention is to provide a plurality of removableheads of various sizes to meet the bore requirements of the Idiiferentmusical instruments now in use.

Heretcfore the devices for removing dents from U the tubular casings ofmusical instruments of the horn type have been so constructed that onlydents in the straight portions of the casing could be removed and it istherefore the purpose of this invention to provide a dent removingdevice which may be inserted in the tubular casing of a horn musica]instrument and properly located with respect to the dent, regardless ofthe path described by the casing.

With the above and other objects and ad- Vantages in view, the inventionconsists of certain details of construction and operation of parts whichwill hereinafter appear. For purposes of illustration the invention willbe described and claimed with reference to the accompanying drawing inwhich like numbers distinguish like parts and in which:

Fig. l is a sectional view of a horn musical instrument partly inelevation having my invention inserted therein for removing dentstherefrom;

Fig. 2 is a longitudinal sectional view partly in elevation of myinvention, and

Fig. 3 is a side elevation of a plurality of remo-vable heads of varioussizes adapted to be used on my device for different size tubing.

In the illustrated embodiment characterizing my invention I indicates aexible shaft of any suitable length and diameter which is mountedthreadably in an internally threaded sheaf or housing 2 and which isprovided at one end with 5 an operating handle or crank 3 and at theopposite end with a head d.

The head ll is made of a single casting of metal having a longitudinallyextending slot 5 provided therein in which an expanding member ispivotally mounted. The slot 5 of the head l provides a front noseportion 'l and a rear Wall portion 8.

The rear wall portion 8 of the head is pro-vided with a screw threadedopening S through which ll the inner end l@ of the flexible shaft l isthreadably mounted.

The expanding member 6 is pivotally supported at one end to the head 4,closely adjacent the rear wall portion 8 thereof by means of a pivot pinil. The pivoted end of the expanding member 6 is inwardly curved at I2to provide a working surface against which the inner end li! of theflexible screw shaft i is adapted to bear for actuating the expandingmember. The surface 2- l 3 provided on the expanding member is curvedoutwardly in such manner as to provide a suitable working surface forbearing against the indentation to be removed from a. tubular casing.

In order to prevent the device from turning within the tubular casingwhen operated, suitable holding means such as a clamping band Hl havinga gripping member l5 provided therein is xably secured to the shear orhousing 2.

For the purpose of adapting the device for 35 tubing of various sizes, aplurality of heads of any given size or shape may be provided. Referringto Fig. 3 of the drawing the head I6 is adapted for use in straighttubing, the said head being provided With a cylindrical shaped bodyportion which may be rounded on the upper end thereof and the heads il,il and Il are adapted for curved tubing by being made co noidal shaped.

In operation, assuming that the above is to be put in service toobliterate an indentation i8 in a tubular casing I9 of a horn musicalinstrument as illustrated in Fig. l of the drawing. The head 4 of thedevice is inserted in the open end 20 of the horn musical instrument andpushed around the casing thereof until it is contiguous to theindentation to be removed. By gripping the member l5 with one hand toprevent rotation of the Asheaf or housing 2 and turning handle 3 in aclockwise direction, the flexible screw shaft l is rotated and is causedto move in a limited longitudinal direction due to its threadedconnection with the sheaf 2 and the head fi, whereby the inner end I 0of the flexible shaft is caused to bear against the Working surface I2of the expanding member 6 which in turn causes the expanding member tobe operated to bear with practically any desired force upon the interiorsurface ci the casing i9 to force the dent or indentation i3 into thenormal plane of the casing thereby obliterating the indentation and ineffect reforming said casing to provide a true cylindrical interior.Upon turning the handle 3 in a counter-clockwise direction the pressureof the Vflexible screW shaft upon the expanding member 6 is releasedthereby permitting the expanding member to return to its normalinoperative position.

It will thus be seen that I have provided a simplied form of dentremoving device Which is Well adapted for all the purposes indicated.Even though I have herein disclosed my invention as comprising certaindetails of construction it is nevertheless to be understood that variouschanges may be made therein Without departing from the spirit or scopeof my invention.

I-Iaving described my invention, what I claim v as new and Wish tosecure by Letters Patent, is-

1. A dent removing device comprising a head, an expanding member pivotedto said head, and means for actuating said expanding member, said meanscomprising a screw threaded flexible shaft having one end adapted toabut against said eX- panding member and a handle secured to the otherend of said flexible shaft.

2. A dent removing device comprising a head, an expanding member pivotedto said head, a sheaf, and means for actuating said expanding member,said means comprising a flexible shaft mounted screw threadably in saidsheaf and having one end connected detachably toisaid head and adaptedto abut against said expanding member, means for moving said flexibleshaft in said sheaf longitudinally against said expanding member or awaytherefrom and means for holding said sheaf in fixed position.

WILLED WILLIAMS.

